LoRa & LoRaWAN · Study deck
LoRaWAN Assessment: Regional Reference and Trade-Offs
LoRaWAN is a low-power wide-area network system for small messages.
Radio Remi is your guide for this deck.
After studying this chapter
Learning objectives
You will be able to:
- Test reference: lorawan quick reference card with a concrete scenario and pass criteria.
- Validate debate: lorawan vs. cellular iot with a concrete scenario and pass criteria.
- Explain: LoRaWAN is a low-power wide-area network system for small messages.
- Explain: A quick reference helps only when the team first names the region, channel plan, message need, and power source.
Major section
Start With the Decision
LoRaWAN is a low-power wide-area network system for small messages.
- Data rate is the speed of the message link.
- Duty cycle is the share of time the radio may transmit; payload is the useful data in a message.
- A LoRaWAN setup must match its regional channel plan.
Major section
Reference: LoRaWAN Quick Reference Card
A quick reference helps only when the team first names the region, channel plan, message need, and power source.
- LoRaWAN means a low-power wide-area network system for small device messages.
- Duty cycle means the share of time a radio may transmit.
- A payload means the useful sensor data carried inside a message.
Major section
Debate: LoRaWAN vs. Cellular IoT
This chapter is a design-decision exercise.
- It teaches how to make a bounded cost comparison, identify the uncertainty that can reverse it, and then place that result beside the non-cost evidence needed for a defensible recommendation.
- LoRaWAN is a protocol for small messages over long-range, low-power radio links.
Major section
Debate: LoRaWAN vs. Cellular IoT (continued)
A protocol is a shared set of rules for exchanging messages.
- A payload is the useful data inside a message.
- The other choice is Narrowband IoT (NB-IoT), a service run by a mobile network operator.
- A city is considering 10,000 smart-parking sensors.
- For this exercise, both choices remain possible.
Major section
Debate: LoRaWAN vs. Cellular IoT (continued)
Each sensor reports an average of 20 occupancy-change messages per day, with 10 raw application-payload bytes per message.
- A low modeled cost cannot rescue a failed hard limit.
- It leaves out protocol overhead, retries, reply messages, extra record details, and downloads.
- The arithmetic gives both choices the same workload.
Major section
Debate: LoRaWAN vs. Cellular IoT (continued)
Cost is therefore one evidence stream, not a shortcut around the other three.
- The goal is not to prove that one technology is always cheaper.
- A sensor body, application, installation task, or civil-work item may be excluded only when evidence shows that it is identical for both candidates.
- The required finding is cost remains inconclusive.
Major section
Debate: LoRaWAN vs. Cellular IoT (continued)
If it differs, it belongs in the model.
- Every monetary value in this exercise is an editable classroom cost unit (CU).
- The values are not prices, quotes, tariffs, or forecasts.
- A hosted or public LoRaWAN service, for example, could have per-device charges unlike the private LoRaWAN model used here.
Major section
Debate: LoRaWAN vs. Cellular IoT (continued)
Shared inputs are N=10,000 devices and H=5 years.
- Neither should be disguised as a precise point estimate when the supporting evidence is still a range.
- This ordering shows why Where the five-year cost result flips.
- The highest-value next evidence is evidence that narrows required gateway-site count and annual service cost.
Major section
Debate: LoRaWAN vs. Cellular IoT (continued)
The illustrative test ranges G=22–38 and S=6–10 occupy both sides of the break-even line, so cost does not distinguish the candidates yet.
- Replacement, remediation, or migration exposure can move the boundary again.
- For the “classroom assumptions — not prices, quotes, or forecasts”–“n = 10,000” decision, record “Classroom assumptions — not prices, quotes, or forecasts” as the starting condition and reopen “20 messages/day” if “H = 5 years” changes.
- The boundary also depends on N and H.
Major section
Debate: LoRaWAN vs. Cellular IoT (continued)
For the “classroom assumptions — not prices, quotes, or forecasts”–“n = 10,000” decision, record “Classroom assumptions — not prices, quotes, or forecasts” as the starting condition and reopen “20 messages/day” if “H = 5 years” changes.
- If dated service evidence supports only a range of S=7–11, that range lies on both sides of 9.
- Choosing the convenient side of the range would create false precision.
- Testing 0, 100,000, and 200,000 CU exposures makes the consequence visible without pretending that an unresolved risk is known exactly.
- Representative coverage evidence shows/does not yet show. Owns infrastructure and operations.
Major section
Debate: LoRaWAN vs. Cellular IoT (continued)
Cost evidence does not establish coverage, lifecycle, infrastructure control, reliability, or approval.
- Recalculate the underlying models when fleet size or horizon changes; do not carry this simplified equation into a different scenario as if it were universal.
- A favorable cost region cannot rescue a candidate that lacks service availability, representative-site coverage, supported device behavior, a viable operations owner, or another hard requirement.
- LPWAN Technology Selection — requirement records, hard gates, evidence matrices, and recommendation traces.
Major section
Debate: LoRaWAN vs. Cellular IoT (continued)
The cost model can support a conditional five-year cost statement, a break-even threshold, and the highest-value uncertainty.
- Under the stated operating models and assumptions, candidate has the lower modeled five-year incremental network-path cost by CU; cost remains conclusive/inconclusive while spans.
- A response receives no release credit, regardless of its point total, if it says that either technology is universally cheaper/better or recommends a candidate that has failed a hard gate.
- The classroom models are TCOL=325,000+12,500G and TCON=300,000+50,000S CU over five years.
Deck summary
Key takeaways
LoRaWAN is a low-power wide-area network system for small messages.
- A quick reference helps only when the team first names the region, channel plan, message need, and power source.
- This chapter is a design-decision exercise.
- A protocol is a shared set of rules for exchanging messages.
- Each sensor reports an average of 20 occupancy-change messages per day, with 10 raw application-payload bytes per message.
Retrieval practice
Recall check 1 of 4
Radio Remi says: answer from memory, then check your reasoning.
Q1Per this LoRaWAN cheat sheet, what is the trade-off between SF7 and SF12?
Show answer
Answer: D see answers page
Q2This cheat sheet distinguishes three LoRaWAN device classes by receive behavior. Which class listens continuously except while transmitting and uses the most power?
Show answer
Answer: D The cheat sheet defines three classes: Class A opens receive windows after an uplink, Class B adds scheduled receive windows, and Class C listens continuously except while transmitting and uses the most power.
Retrieval practice
Recall check 2 of 4
Radio Remi says: answer from memory, then check your reasoning.
Q3For 10,000 sensors sending 20 messages per day with 10 raw payload bytes per message over five 365-day years, which statement correctly describes the shared workload and its limits?
Show answer
Answer: B The shared workload is 365 million application messages and 3.65 GB of raw payload. The exclusions prevent the arithmetic from being mistaken for complete traffic or a technology decision.
Retrieval practice
Recall check 3 of 4
Radio Remi says: answer from memory, then check your reasoning.
Q4Using the classroom models, what is the defensible cost finding at G = 34 private gateway sites and S = 7 CU/device/year for NB-IoT service?
Show answer
Answer: A At G = 34, private LoRaWAN is 750,000 CU.
Retrieval practice
Recall check 4 of 4
Radio Remi says: answer from memory, then check your reasoning.
Q5At G = 34 sites, the break-even service assumption is S* = 9 CU/device/year. If the credible NB-IoT service-cost range is S = 7 to 11, what must the reviewer record?
Show answer
Answer: C At G = 34 the threshold is S* = 9.
Print reference
Answers 1 of 2
Answer key.
- D · RP002-1.0.5 §3.4.3 lists EU863-870 SF7/125 kHz at 5,470 bit/s and SF12/125 kHz at 250 bit/s. Sensitivity and range depend on the receiver, antennas and path; packet airtime depends on the full frame.
- D · The cheat sheet defines three classes: Class A opens receive windows after an uplink, Class B adds scheduled receive windows, and Class C listens continuously except while transmitting and uses the most power.
Print reference
Answers 2 of 2
Answer key.
- B · The shared workload is 365 million application messages and 3.65 GB of raw payload. The exclusions prevent the arithmetic from being mistaken for complete traffic or a technology decision.
- A · At G = 34, private LoRaWAN is 750,000 CU.
- C · At G = 34 the threshold is S* = 9.